During the Daqi Dynasty, murders occurred frequently in Bianjing City, making people panic. Su Yunxi was the daughter of a former Dali Temple judge. Her father was unjustly killed while investigating the case, and her family fell into ruin. She lived incognito in Yizhuang, south of the city. She relied on the case-solving notes left by her father and the autopsy skills she had learned since she was a child to secretly perform autopsies on people at the bottom to find the murderer. Due to a bizarre "Oran Corpse Burning Case", she was forced to expose her skills and was spotted by the newly appointed Kaifeng Governor. She joined the Kaifeng Palace in the name of "staff", but in fact she became the secret "widowmaker" in the palace.
Searching for traces of dead bones and identifying the perpetrators with traces of poison, Su Yunxi used an extremely calm mind to solve seemingly unsolvable cases: the oiran was burned to death in a secret room, with no complete injuries on the body; the scholar died in the academy late at night, A strange talisman was left beside her; the daughter of an official had been missing for many days, and her body was finally found in an ancient well outside the city... With every autopsy, she was able to uncover key clues from the subtle traces of the body, making it impossible to hide the real culprit.
Faced with the contempt of his colleagues in the government, the threat of silence from the real murderer, and the suppression of the powerful people involved in the case, Su Yunxi never backed down. She hides her daughter's fragility, uses resourcefulness to resolve crises, and uses irrefutable evidence to fight back doubts. Every time she solves a case, she vindicates the wrongdoer and allows more and more people to see her power.
As her fame grew, she attracted the attention of Murong Heng, the king of Duan who was investigating the case in secret. Murong Heng seemed to be idle, but in fact he was secretly investigating corruption and old cases in the court. The two had many confrontations during the investigation, from testing each other to trusting each other, and finally worked together to uncover a series of unsolved cases with wide implications, and gradually came closer to the truth about Su Yunxi's father's unjust murder.
